Question
The average score received by Hilda, Shiyun, Sabrina and Jean in a recent Mathematics test was 80 marks. Hilda and Shiyun both got 8j marks each while Sabrina got half of Jean's marks. How many marks did Sabrina score for the test? Express your answer in terms of j.
3 m

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The average score received by Hilda, Shiyun, Sabrina and Jean in a recent Mathematics test was 80 marks. Hilda and Shiyun both got 8j marks each while Sabrina got half of Jean's marks. How many marks did Sabrina score for the test? Express your answer in terms of j.